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222739-25-5

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222739-25-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 222739-25-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,2,7,3 and 9 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 222739-25:
(8*2)+(7*2)+(6*2)+(5*7)+(4*3)+(3*9)+(2*2)+(1*5)=125
125 % 10 = 5
So 222739-25-5 is a valid CAS Registry Number.

222739-25-5Downstream Products

222739-25-5Relevant articles and documents

Synthesis of the angiotensin-converting enzyme inhibitors (-)-A58365A and (-)-A58365B from a common intermediate

Clive, Derrick L. J.,Coltart, Don M.,Zhou, Yuanxi

, p. 1447 - 1454 (2007/10/03)

(-)-A58365A (1) and (-)-A58365B (2), which are inhibitors of angiotensin-converting enzyme, were synthesized from the subunits 9 and 10. These were coupled, and the resulting individual amides 17a,b were converted by ozonolysis into aldehydes 18a,b, which underwent cyclodehydration to the enamides 19a,b. Treatment with a stannane served to generate the vinyl stannanes 20a,b, from which ketones 22a,b were produced by protodestannylation and ozonolysis. Base treatment and hydrogenolysis then afforded (-)-A58365A (1). The intermediates 17a,b were also converted into aldehydes 26a,b by hydroboration and oxidation, and a similar sequence to that used for (-)-A58365A was then applied in order to complete the first enantiospecific synthesis of the congener, (-)-A58365B (2).

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